Zbigniew Romanowski’s Post

Most C++ developers learn noexcept as a compiler optimization hint. That framing is technically correct and completely useless for building intuition. Here is how I think about it now: Without noexcept: "Something might go wrong inside here that I am pushing up to you to handle." With noexcept: "I own my failure modes. I will never surprise you with an exception. Check my return value." It is a contract. Not a hint. This maps directly to how C developers already think, functions return error codes, callers check them. noexcept is C++ making that contract explicit and machine-enforced. Once I started reading it as intent rather than mechanism, I started putting it in far more places. And my APIs got cleaner because of it. If your function handles its own errors and signals failure through return values, mark it noexcept. You are telling the reader something important. #cpp #softwaredevelopment #programming

C15 Union Types: finally, compiler-checked “either/or” results 🚨 Tired of returning object (or building awkward base classes) just to say “this method returns A *or* B”? C15 brings a real solution: union types. ✨ What clicking gets: ✅ How `union` declares a closed set of case types (even unrelated ones) ✅ Implicit conversions so assignments stay clean ✅ Exhaustive pattern matching—the compiler forces every case to be handled (no `_` / `default` safety blanket) ✅ A clear roadmap for broader exhaustiveness in C# 🧠 Example vibe: define `Pet(Cat, Dog, Bird)` once… then `switch` with confidence knowing every case is covered. If discriminated unions were missed in C#, this is the most C#-native take yet. 🔥 https://lnkd.in/dsu5t_8M #csharp #dotnet #programming #patternmatching #compilers

Why don’t more C++ developers talk about Return Value Optimization (RVO)? This optimization has existed in C++ since 1997, yet many developers still assume returning objects is expensive. Let’s take a simple case. A function creates an object and returns it: MyClass Myfun() { return MyClass obj; } Without optimization, you might imagine this happening: • create obj inside Myfun() • copy it when returning to main() • destroy the local object That sounds like extra work, right? Here’s the interesting part. Modern C++ compilers apply Return Value Optimization (RVO). Instead of: create → copy → destroy The compiler simply constructs the object directly in the caller’s memory. So the object is effectively created inside main() from the start. No extra copy. No unnecessary destruction. A subtle optimization — but one that makes returning objects cheap and idiomatic in C++. Small compiler optimizations like this are why understanding how C++ actually works under the hood matters. Did you learn about RVO early, or much later in your C++ journey? #CPP #SoftwareEngineering #Programming #SystemsProgramming #Developers

🚀 Level Up Your Modern C++ Game: 4 Essential Reads! C++ has evolved dramatically in recent years. If you’re still writing code like it’s 2003, you’re missing out on the safety, efficiency, and power of the modern standards. To master the language today, you need resources that leverage C++20 and C++23. Here are four books I highly recommend for any developer's shelf: 1️⃣ Programming: Principles and Practice Using C++ (3rd Edition) By Bjarne Stroustrup Who better to learn from than the creator of the language himself? This isn't just about syntax, it’s about fundamental programming principles. The 3rd edition is fully updated for C++20 and C++23, focusing on real-world techniques rather than obscure technicalities. 2️⃣ C++ Software Design By Klaus Iglberger Writing code is easy, designing maintainable software is hard. This book is a masterclass in managing dependencies and abstractions. It bridges the gap between classic design patterns and modern C++ capabilities to help you build scalable systems. 3️⃣ C++ Memory Management By Patrice Roy Manual memory management is a double-edged sword. It offers unparalleled flexibility but can lead to critical errors if mishandled. Patrice Roy provides a deep dive into C++ memory mechanisms, teaching you how to automate and optimize for safer, leaner program design. 4️⃣ C++ in Embedded Systems By Amar Mahmutbegović The embedded world is still heavily dominated by C, but modern C++ is a game-changer for firmware. This guide is perfect for developers looking to transition to C++ in resource-constrained environments, ensuring your solutions are robust and safe without sacrificing performance. Modern C++ is more than just a language, it's a powerful toolset for building the future. 💬 Do you have a favorite C++ book that changed the way you code? Let me know in the comments! #embeddedfirmware #cpp #cppprogramming #softwareengineering #embedded #coding #moderncpp #developercommunity

📚 New article just published on SYUTHD! 🔖 Clean Architecture in .NET 10: Mastering C# 14 Discriminated Unions for Type-Safe Error Handling 🏷️ Category: C# Programming 📖 Full article → https://lnkd.in/g6DJeM36 👉 Follow our page for more tech tutorials: https://lnkd.in/gsJDptPM 💬 Telegram: https://t.me/nisethtechno 👍 Facebook: https://lnkd.in/gsKv3Dyn #CProgramming #Tech #Tutorial #Programming #TechBlog #2026

🔹 Part 1: C++ Concepts vs SFINAE (Practical Guide) This short video is part of my "C++ Programming Topics" series 👇 And also included in my broader C++ templates playlist. 💡 The problem: SFINAE is powerful—but it often leads to complex, hard-to-read template code. This can cause: -Cryptic compiler errors -Reduced code clarity -Higher learning curve for maintainers ❌ 📌 This is where C++20 Concepts shine: 👉 They provide a clean and expressive way to constrain templates. 💡 What you’ll learn in this video: ⚙️ Step-by-step evolution from SFINAE to Concepts: 1️⃣ Using enable_if in template parameters A cleaner alternative than putting it in the return type 2️⃣ Constraining a template class (Wrapper) Allow only integral types using SFINAE 3️⃣ Generic sum function Handle different types and control the return type 4️⃣ Concepts vs SFINAE Clear comparison in readability and maintainability 5️⃣ Writing your own concept Define a requirement for types that support add and sub 6️⃣ Combining Concepts with type_traits Reuse existing utilities for powerful constraints 🎯 Key takeaway: Concepts don’t replace SFINAE—they simplify it. Use Concepts when readability matters, and SFINAE when you need lower-level control. 🎥 Watch the video: https://lnkd.in/dpiQNQcF 📚 Full playlist: https://lnkd.in/dDNVWvVC #cpp #moderncpp #programming #softwareengineering #templates #concepts #metaprogramming #cleancode

Built a simple C++ Compiler from Scratch! Sharing my latest project - a simple yet functional C++ compiler built from the ground up using Flex, Bison, and ANTLR4. This project dives into the core phases of compilation and helped me strengthen my understanding of how programming languages actually work behind the scenes. Key Features: • Lexical Analysis using Flex • Syntax Parsing using Bison & ANTLR4 • Three Address Code (TAC) Generation • Basic Assembly Code Generation • Detailed logging of each compilation phase How it works: 1. Source code is tokenized into meaningful units 2. Tokens are parsed based on grammar rules 3. Intermediate code (TAC) is generated 4. Final pseudo-assembly code is produced What I learned: Building a compiler from scratch gave me hands-on experience with: • Language design fundamentals • Parsing techniques and grammar rules (Bison & ANTLR4) • Intermediate representations • Low-level code generation concepts 🛠️ Tech Stack: C++ | Flex | Bison | ANTLR4 | Makefile 📌 Example outputs include: ✔ Token logs from lexical analysis ✔ Three Address Code ✔ Assembly-like instructions This project is a small but meaningful step into the world of compilers and systems programming. 🔗 GitHub Repo: https://lnkd.in/ggkcdTyV I’d love to hear your thoughts or suggestions for improvement! #CPlusPlus #CompilerDesign #Flex #Bison #ANTLR4 #SystemsProgramming #SoftwareEngineering #LearningByBuilding #BIE #bioinformatics #BAU

Programming idea: every function is a prompt. Every time it runs it is a roll of the die. But as the models get better, so will your program.

Claude Code Tip #22 / 100 — One word that unlocks Claude's deepest reasoning. Add `ultrathink` to your prompt and Claude switches into high-intensity adaptive reasoning mode. Not the default. Extended, structured reasoning that works through the problem from multiple angles before committing to an answer. Use it when it counts: architecture decisions, tricky debugging sessions, security reviews, complex refactors. For simple tasks—renaming a variable, quick fixes—use `/effort low` instead. No reason to burn reasoning tokens on something trivial. Match the tool to the task. `ultrathink` for hard questions. `/effort low` for fast ones. One word changes the output quality. Next time you're stuck on something hard, add it to your prompt. You'll notice the difference. #ClaudeCode #AITools #DeveloperProductivity #Programming #SoftwareEngineering

🚀solved a dynamic programming(dp) question 👉climbing stairs a easy problem but builds a strong base to understand dp concepts 👉There can be two method to solve these types of dp question one method is using memoization another method is tabulation method I finds tabulation method easy to easily grab this questions concepts 👉 Tabulation method works on one principle which is moving from base case to required answer until you get. 👉Before solving any dp question one must have good recursion knowledge.